Combination coal grading screen and picker table.



O. B. KLOETZER. COMBINATION GOAL GRADING SCREEN -ANN PIGKEE TABLE.APPLICATION FILED JAN.26. 1912.

a Vcitizen of Austria-I-lungary,

- Iwhich the fo To it may camera:

STATES .PATENT oEFIoE.

' onor. non'rznn., or COLUMBUS, omo.

confirmaron con. emma scnEEN mi) Hexen TABLE.

I `Oi'ro B. 'KnoE'rzEigv residing at Columbus, in the county of Franklinand State -of Ohio, have invented certain new and useful Improvements inCombination Coal Grading Screen and Picker Table, of

lowing is a specification.

My'invention rela-tes to coal grading machines and is' particularlydirected to the Be it known that provision of a combination coalgradingv screen and picker table. l

, It is designed to providel a screen grader and a picking Itabletherefor, which not only decrease the required space in a very vgreatdegree,`but which render it possible to obtain Awhat is termed the runof the mine with practically no'preparation and at any time 1t. may bedeslred without changing the normal course Vof the bulk of the materialover the screening surfaces.

It is further aimed in the a'ttamnent of this result to finallydistribute the run of the mine upon the picker table in two or morelayers with the bulk of thelarger material in the uppermost layer andtherefore subject to ready access by the pickers surrounding the table..v

My invention preferably contemplates the provision of a spiraloscillatory screen operating in conjunction with a rotary picking tablepreferably mounted upon a shaft forming the means of support of thespiral vscreen and desirably vconcentric therewith.

The spiral screen may be varied as ,to structural details, but itdesirably comprises a plurality of successive sections of screen ofdeterminately increasing mesh, each forming a false bottom for the bodyproper of the chute. Beneath the terminus of each section the bottom ofthe body portion .proper ov the chute is provided with a supplementaland laterally directed chute and each of these supplemental chutes hasagate therefor normally raised, but capable of being lowered into thesame plane with the floor or bottom of the body portion' proper of thescreen to' close the opening to lts chute. When all of these gates areclosed, the supplemental chutes are cut off and the run of the mine ispermitted to pass down the entire length of the screen during the course`of which passage the smaller material passes the larger proceeds to theend of the actual speommon of man ramt. Application lednlanuax'y 26,1912. 'Serial No. 673,601;

Patented July 16, 1912.

l-screenihg surfaces. Thus the run of the mine would be delivered inlayers to the picker table whlch is, constantly rotating rielzlith the`end of the oscillatory screen.

referred embodiment gf my inven tion is s ownin the accompanyingdrawings,

in which similarcharacters of re rence designate corresponding parts,and in which- Figure 1 is a to plan View ofvmy screening structure, and,Fig. 2 is a side elevation of the structure showing the relativepositions of the vibratory oscillating screen and the picking table. vIn the drawings, there is shown the vertijcal shaft 1 journaled at' itsbase in thecasting 2`and having its upper end provided with a beveledgear 3 with which meshes a bevel pinion 4.- upon the endv of a shaft 5carried in bearings 6 which may be mounted upontimbers as shown at 7'.Between these timbers if such lmethod of mounting is used, the shaft 5carries a sprocket 8 which is driven by means of a chain 9 extendingover a gear 10 upon the driving shaft 11 mounted upon the adjacentframework 12, such shaft 11 carrying a pulley 13 which is driven as iscustomary and carrying at its ends crank arms 14C-to which are connectedlinks 15.

Keyed to the shaft 1 at a point compara .tively near its base is atable-like structure `16 which is adapted and constructed to rotatetherewith and which is supported near its outer periphery by spacedstanchions 17 Ahaving' roller bearings 18 upon their upper ends bearing`against 'and supporting the track surface 19 upon the under surface ofthe table-like structure 16 at the outerpcriphery thereof. It will beunderstood from this that the driving of the pulley 13 drives the shaft11, sprocket 10 and by means of chain 9 drives the sprocket 8, which inturn rotates the shaft 5 and by means of the intermeshing connection, ofthe bevel 'gear 3 and pinion 44 rotates the shaft 1 carrying thetable-like structure therewith. Thus the table-like structure which isknown generally as the picker table, is continuously and positivelyrotated.

The shaft 1 is desirably provided at intervals with collars 20 and thesecollars serve as supports for spider arms 21 which support a spiralchute 22 of channel form and having a false bottom 23 of reticulatematerial arranged in successively increasing grades, thatl is, with itsapertures disposed in sets which are successive and in such suc` of thescreen.

cessive sets increase so that material passing down this false bottom issuitably graded in a manner known. At or near the end of each set ofapertures in this false bottom, the bottom proper of the chute isprovided with a supplemental chute laterally directed and designated 24.The entrances to these laterally directed chutes vare controlled bypivoted gates 25 which are normally in the position of the gate shown atA in Fig. 2, but which may be lowered to the position of the gate shownat B in the same ligure. lVhen in the position shown at A, the materialis graded into the grades for which the screens are provided such as,-for instance, egg, nut and lump, and these respective grades aredirected into the laterally disposed chutes and delivered at the desiredpoints. However, when it becomes desirable to attain the run of the minethe valves or gates are closed by movement into posi.

tion shown at B. The material then passes down along the false bottom ofthe spiral chute and along the actual bottom thereof. The finer-materialnecessarily passes into` the actual base of the chute, while theextremely heavy material is maintained upon the top Thus the material isdelivered from the end of the chute upon the rotating picker table intwo distinct` layers with the heavier material forming a large portionof the upper layer. Even in the run of the mine it is generallydesirable to have the pickers work upon this heavier coal and itsposition in the upper' layer renders it very readily accessible. Ofcourse, the operation is continuous under ordinary circumstances andthere is provided means for brushing the material off the picker tablejust before completing one revolution 'and passing it into any suitablereceptacle or otherwise disposing of it.

vThe screening operation of the spiral screen is greatly facilitated bythe connection thereto of the links 15 as at 15a and of course thecontinuous rotation of the,

v shaft 1l causes the transmission of the'oscillatory movement to thespiral screen.

It willv be seen that I have provided an extremely simple and compactstructure for grading coal,7which may be readily transformed into adirect delivery device for the entire run of the mine.- In addi-tion, Ihave greatly minimized the required space in machines of this type byproviding a rotary picker table in combination with an oscillatoryspiral screen oscillating about the shaft with which rotates the pickingtable.

1. A combination coal grader screen and picker table comprising a spiralgrading element, a rotating receiving element disposed beneath saidspiral element, and means for eliminating the grading action of thespiral element.

2. A combined coal grader screen and picker table comprising a rotarypicker table, a spiral screen element having a false bottom ofreticulate material in sets of varying meshes, means for conducting thematerial selected by each set of meshes, and means for rendering saidconducting means ineffective whereby the entire bulk of mate-Ilal'placed Aupon the spiral element is delivered at its lower end on tothe picker table. y

3. Av combined coal grader screen vand picker table comprising ascreening element, a picker table beneath the delivery end of saidscreening element, the delivery end and the said table being relativelyrotatable,

means for grading the material passing over the said screening element,and means for rendering said grading means ineffective to Apermitdelivery of the ent-ire bulk of material to the picker table.

In testimony whereof I aliix my signature in presence of two Witnesses.

OTTO B. KLOETZER.

Witnesses:

WALTER E. S. BooK, C. P. Conn'r'r.

